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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/98513] [10/11 Regression] Wrong code with -O3 since r10-2804-gbf05a3bbb58b3558 Date: Wed, 06 Jan 2021 08:26:53 +0000 [thread overview] Message-ID: <bug-98513-4-rtUlEW5dDV@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-98513-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98513 --- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> --- So the issue is we cannot decide between [ (] ) and [ ( ) ] and the check for [ (] ) elides the "redundant" check for the upper bound relation. But the check isn't redundant in case the compare cannot be decided. So the simplest fix to the legacy code is to instantiate those not redundant checks which then results in the "expected" Intersecting int [-INF, minus_1_3(D) + 2] EQUIVALENCES: { x_6(D) } (1 elements) and int ~[-2147483647, -2147483646] EQUIVALENCES: { x_6(D) } (1 elements) to int [-INF, minus_1_3(D) + 2] EQUIVALENCES: { x_6(D) } (1 elements) (if we can't do anything fancy, intersection simply chooses the first range as result)
next prev parent reply other threads:[~2021-01-06 8:26 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-04 15:21 [Bug tree-optimization/98513] New: " marxin at gcc dot gnu.org 2021-01-04 15:21 ` [Bug tree-optimization/98513] " marxin at gcc dot gnu.org 2021-01-04 15:41 ` marxin at gcc dot gnu.org 2021-01-04 16:24 ` marxin at gcc dot gnu.org 2021-01-04 16:33 ` marxin at gcc dot gnu.org 2021-01-05 9:21 ` marxin at gcc dot gnu.org 2021-01-05 9:24 ` marxin at gcc dot gnu.org 2021-01-05 9:28 ` marxin at gcc dot gnu.org 2021-01-05 9:28 ` rguenth at gcc dot gnu.org 2021-01-05 15:55 ` amacleod at redhat dot com 2021-01-05 16:04 ` rguenth at gcc dot gnu.org 2021-01-05 16:40 ` rguenth at gcc dot gnu.org 2021-01-06 8:02 ` rguenth at gcc dot gnu.org 2021-01-06 8:26 ` rguenth at gcc dot gnu.org [this message] 2021-01-06 9:21 ` cvs-commit at gcc dot gnu.org 2021-01-06 9:33 ` [Bug tree-optimization/98513] [10 " marxin at gcc dot gnu.org 2021-01-12 15:23 ` cvs-commit at gcc dot gnu.org 2021-01-12 15:26 ` rguenth at gcc dot gnu.org 2021-10-06 22:34 ` pinskia at gcc dot gnu.org
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